Update r5rs.sld
Update r5rs.sld

Add missing identifiers from erratum 22 of http://trac.sacrideo.us/wg/wiki/R7RSSmallErrata.
holmescn/chibi-scheme,holmescn/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme